Article(id=1266686981347103345, tenantId=1146029695717560320, journalId=1266358798366031926, issueId=1266686777441018407, articleNumber=null, orderNo=null, doi=10.13532/j.jmsce.cn10-1638/td.2025-1175, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1748275200000, receivedDateStr=2025-05-27, revisedDate=1755705600000, revisedDateStr=2025-08-21, acceptedDate=null, acceptedDateStr=null, onlineDate=1779931310258, onlineDateStr=2026-05-28, pubDate=1777046400000, pubDateStr=2026-04-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1779931310258, onlineIssueDateStr=2026-05-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1779931310258, creator=13701087609, updateTime=1779931310258, updator=13701087609, issue=Issue{id=1266686777441018407, tenantId=1146029695717560320, journalId=1266358798366031926, year='2026', volume='8', issue='2', pageStart='013014-1', pageEnd='023542-19', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1779931261643, creator=13701087609, updateTime=1779931348520, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1266687141976358949, tenantId=1146029695717560320, journalId=1266358798366031926, issueId=1266686777441018407, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1266687141976358950, tenantId=1146029695717560320, journalId=1266358798366031926, issueId=1266686777441018407, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=023021-1, endPage=023021-16, ext={EN=ArticleExt(id=1266686982605394547, articleId=1266686981347103345, tenantId=1146029695717560320, journalId=1266358798366031926, language=EN, title=Study on dynamic fracture characteristics and fracture process zone evolution mechanism in sandstone under freeze-thaw cycles, columnId=1266686779106152540, journalTitle=Journal of Mining and Strata Control Engineering, columnName=Fundamental Research, runingTitle=null, highlight=null, articleAbstract=
This study, through laboratory experiments, investigates the effects of freeze-thaw (F-T) cycles on the fracture characteristics of sandstone under seasonal freezing conditions on the Qinghai-Tibet Plateau. Sandstone samples were first pretreated with F-T cycles in a temperature range of 20 ℃ to −20 ℃ and then subjected to impact three-point bending tests with the aid of a SHPB system. In the meantime, the evolution of the fracture process zone (FPZ) was analyzed via high-speed camera recordings and Ncorr digital image correlation software. The results demonstrate that F-T cycles induce mechanical property degradation in sandstone, which in turn affects its dynamic fracture behavior. As F-T cycles increase, the time required for pre-existing crack penetration extends, the crack opening width within the same time interval increases, and the time needed to achieve an equivalent opening width decreases. Crack opening velocity is significantly suppressed by F-T cycles before 111 ms, while this influence dininishes afterward, indicating that F-T effects predominantly govern the initial crack tip propagation stage. The evolution of the FPZ can be divided into two stages: expansion and contraction. To be specific, in the initial stage, microcracks cluster near the crack tip, and the FPZ expands with the increase in load. After main crack penetrates, the FPZ contracts and eventually dissipates due to energy release. F-T cycles promote the formation of a substantial number of pores within the sandstone, enhancing its energy absorption capacity. As a result, FPZ peak values are reduced and peak stresses occur earlier, accompanied by a transition in failure mode from brittle to ductile, characterized by prolonged crack propagation time and reduced initial opening velocity. The research results can provide basic experimental data reference for the dynamic disaster relief of engineering rock masses in cold regions.
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以青藏高原季节性青砂岩为主要研究对象, 通过室内试验探究冻融循环(F-T)对青砂岩动态断裂特征的影响。采用20 ℃~−20 ℃的冻融区间对岩样进行预处理, 结合SHPB试验装置开展冲击三点弯曲试验, 并利用高速摄像机和Ncorr软件分析断裂过程区(FPZ)的演化规律。研究结果表明: 青砂岩力学性能在经历冻融循环之后显著劣化, 并影响其动态断裂行为。随着F-T次数增加, 预制裂缝贯通时间延长, 相同时间内的裂纹张开宽度增加, 且达到相同宽度所需时间减少。在111 ms前, 裂纹张开速度受冻融循环次数的抑制, 之后影响减弱。由此可见, 冻融作用主要影响裂缝尖端初始扩展阶段。FPZ的发育规律可分为“扩展—收缩”两阶段, 初始阶段微裂纹在裂缝前端聚集, 随荷载增大FPZ范围扩展; 主裂纹贯通后, 因能量释放而收缩消失。岩石内部在冻融作用下形成了大量孔隙结构, 增强了能量吸收能力, 导致FPZ极值减小且峰值提前, 破坏模式由脆性向延性转变, 表现为裂缝贯通时间延长和初始张开速度降低。研究成果可为寒区工程岩体的动力灾害解危提供可参考的基础试验数据。
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, authorsList=于美鲁, 马定, 左建平, 徐颖, 刘怀谦, 李春元, 李政岱, 王春华)}, authors=[Author(id=1266686987227517629, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=meilu_yu@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1266686987340763842, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, authorId=1266686987227517629, language=EN, stringName=Meilu YU, firstName=Meilu, middleName=null, lastName=YU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, 3, address=
1State Key Laboratory of Digital Intelligent Technology for Unmanned Coal Mining, Anhui University of Science and Technology, Huainan 232001, China
2Guizhou Institute of Mine Safety Science Co., Ltd., Guiyang 550025, China
3Guizhou Coal Mine Design and Research Institute Co., Ltd., Guiyang 550025,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1266686987600810691, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, authorId=1266686987227517629, language=CN, stringName=于美鲁, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1安徽理工大学 煤炭无人化开采数智技术全国重点实验室, 安徽 淮南 232001
2贵州省矿山安全科学研究院有限公司, 贵州 贵阳 550025
3贵州省煤矿设计研究院有限公司, 贵州 贵阳 550025, bio={"content":"
于美鲁(1992—), 男, 山东汶上人, 讲师, 博士。E-mail: meilu_yu@163.com
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于美鲁(1992—), 男, 山东汶上人, 讲师, 博士。E-mail: meilu_yu@163.com
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3贵州省煤矿设计研究院有限公司, 贵州 贵阳 550025)])]), Author(id=1266686987672113861, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, orderNo=1, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1266686987768582855, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, authorId=1266686987672113861, language=EN, stringName=Ding MA, firstName=Ding, middleName=null, lastName=MA, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1State Key Laboratory of Digital Intelligent Technology for Unmanned Coal Mining, Anhui University of Science and Technology, Huainan 232001, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1266686988024435400, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, authorId=1266686987672113861, language=CN, stringName=马定, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1安徽理工大学 煤炭无人化开采数智技术全国重点实验室, 安徽 淮南 232001, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1266686986581594789, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, xref=1, ext=[AuthorCompanyExt(id=1266686986585789094, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, companyId=1266686986581594789, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1State Key Laboratory of Digital Intelligent Technology for Unmanned Coal Mining, Anhui University of Science and Technology, Huainan 232001, China), AuthorCompanyExt(id=1266686986594177703, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, companyId=1266686986581594789, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1安徽理工大学 煤炭无人化开采数智技术全国重点实验室, 安徽 淮南 232001)])]), Author(id=1266686988091544266, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=zjp@cumtb.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1266686988154458828, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, authorId=1266686988091544266, language=EN, stringName=Jianping ZUO, firstName=Jianping, middleName=null, lastName=ZUO, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
4, address=
4School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1266686988443865805, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, authorId=1266686988091544266, language=CN, stringName=左建平, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
4, address=
4中国矿业大学(北京) 力学与土木工程学院, 北京 100083, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1266686986837447344, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, xref=4, ext=[AuthorCompanyExt(id=1266686986841641649, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, companyId=1266686986837447344, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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4中国矿业大学(北京) 力学与土木工程学院, 北京 100083)])]), Author(id=1266686988515168975, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1266686988846518993, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, authorId=1266686988515168975, language=EN, stringName=Ying XU, firstName=Ying, middleName=null, lastName=XU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1State Key Laboratory of Digital Intelligent Technology for Unmanned Coal Mining, Anhui University of Science and Technology, Huainan 232001, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1266686988930405074, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, authorId=1266686988515168975, language=CN, stringName=徐颖, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1安徽理工大学 煤炭无人化开采数智技术全国重点实验室, 安徽 淮南 232001, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1266686986581594789, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, xref=1, ext=[AuthorCompanyExt(id=1266686986585789094, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, companyId=1266686986581594789, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1安徽理工大学 煤炭无人化开采数智技术全国重点实验室, 安徽 淮南 232001)])]), Author(id=1266686989022679764, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, orderNo=4, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1266686989282726614, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, authorId=1266686989022679764, language=EN, stringName=Huaiqian LIU, firstName=Huaiqian, middleName=null, lastName=LIU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1State Key Laboratory of Digital Intelligent Technology for Unmanned Coal Mining, Anhui University of Science and Technology, Huainan 232001, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1266686989370806999, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, authorId=1266686989022679764, language=CN, stringName=刘怀谦, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1安徽理工大学 煤炭无人化开采数智技术全国重点实验室, 安徽 淮南 232001, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1266686986581594789, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, xref=1, ext=[AuthorCompanyExt(id=1266686986585789094, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, companyId=1266686986581594789, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1安徽理工大学 煤炭无人化开采数智技术全国重点实验室, 安徽 淮南 232001)])]), Author(id=1266686989706351321, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, orderNo=5, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1266686989807014619, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, authorId=1266686989706351321, language=EN, stringName=Chunyuan LI, firstName=Chunyuan, middleName=null, lastName=LI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1987, 24(4): 235−46., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1266686986581594789, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, xref=1, ext=[AuthorCompanyExt(id=1266686986585789094, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, companyId=1266686986581594789, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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Main mineral composition and content, figureFileSmall=WG4jEswYvJHSCrmmQAdx+g==, figureFileBig=wXYT8yW6WCTXloVwJI8DUw==, tableContent=null), ArticleFig(id=1266686994827596532, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图1, caption=
主要矿物成分及含量, figureFileSmall=WG4jEswYvJHSCrmmQAdx+g==, figureFileBig=wXYT8yW6WCTXloVwJI8DUw==, tableContent=null), ArticleFig(id=1266686994995368693, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.2, caption=
Temperature curve for freeze-thaw cycle, figureFileSmall=GcXVPoHh7fIi4cTIiRPezg==, figureFileBig=0a1pOhL1mL2UB5wpKh5rWA==, tableContent=null), ArticleFig(id=1266686995163140854, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图2, caption=
冻融循环温度曲线, figureFileSmall=GcXVPoHh7fIi4cTIiRPezg==, figureFileBig=0a1pOhL1mL2UB5wpKh5rWA==, tableContent=null), ArticleFig(id=1266686995242832631, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.3, caption=
Experimental procedures and equipment, figureFileSmall=aiOFio1m8Zuv2UjTNkZgcA==, figureFileBig=taiPswM5ATDgqpkIfJhZvA==, tableContent=null), ArticleFig(id=1266686995305747192, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图3, caption=
试验步骤及设备, figureFileSmall=aiOFio1m8Zuv2UjTNkZgcA==, figureFileBig=taiPswM5ATDgqpkIfJhZvA==, tableContent=null), ArticleFig(id=1266686995377050361, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.4, caption=
Dynamic balance test of SHPB for sandstone samples, figureFileSmall=Twc7UljJJ9avzu1kfjIffg==, figureFileBig=XtK9jCbZ60MLNMUA7lgpXQ==, tableContent=null), ArticleFig(id=1266686995444159226, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图4, caption=
青砂岩试样SHPB动态平衡测试, figureFileSmall=Twc7UljJJ9avzu1kfjIffg==, figureFileBig=XtK9jCbZ60MLNMUA7lgpXQ==, tableContent=null), ArticleFig(id=1266686995507073787, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.5, caption=
Sample after the experiment, figureFileSmall=2UX50W+rBVgEq4eCChkQnQ==, figureFileBig=wvjARtQMWtIfYP7RelIyJw==, tableContent=null), ArticleFig(id=1266686995574182652, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图5, caption=
试验后的试样, figureFileSmall=2UX50W+rBVgEq4eCChkQnQ==, figureFileBig=wvjARtQMWtIfYP7RelIyJw==, tableContent=null), ArticleFig(id=1266686995658068733, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.6, caption=
Displacement and peak stress curves under different F-T cycles, figureFileSmall=cruEACjrfuyJil0Fh5XK+Q==, figureFileBig=fHU51++i3JDykpUZSQIUYA==, tableContent=null), ArticleFig(id=1266686995741954814, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图6, caption=
不同F-T循环下位移、峰值荷载曲线, figureFileSmall=cruEACjrfuyJil0Fh5XK+Q==, figureFileBig=fHU51++i3JDykpUZSQIUYA==, tableContent=null), ArticleFig(id=1266686995846812415, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.7, caption=
Peak force and fracture toughness under different freeze-thaw cycles, figureFileSmall=i1ThUrKwZ+I6S1C5IqF3Yw==, figureFileBig=JATSqzd5V46rtfiNQUGlxg==, tableContent=null), ArticleFig(id=1266686995913921280, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图7, caption=
不同冻融循环下的断裂韧度和抗拉强度, figureFileSmall=i1ThUrKwZ+I6S1C5IqF3Yw==, figureFileBig=JATSqzd5V46rtfiNQUGlxg==, tableContent=null), ArticleFig(id=1266686995985224449, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.8, caption=
Sample crack morphology, figureFileSmall=merIDzBWhKC7XTr6FdodBw==, figureFileBig=xQ/NNPB2hTWzePRFKk78tw==, tableContent=null), ArticleFig(id=1266686996056527618, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图8, caption=
试样裂纹形态, figureFileSmall=merIDzBWhKC7XTr6FdodBw==, figureFileBig=xQ/NNPB2hTWzePRFKk78tw==, tableContent=null), ArticleFig(id=1266686996127830787, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.9, caption=
Crack initiation and development process under impact load, figureFileSmall=m0tLiUGcW6sJsvE59jpRZQ==, figureFileBig=6ErJd/HHu7LA0AvfZkrc0w==, tableContent=null), ArticleFig(id=1266686996236882692, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图9, caption=
冲击荷载作用下试件裂纹萌生及发育过程, figureFileSmall=m0tLiUGcW6sJsvE59jpRZQ==, figureFileBig=6ErJd/HHu7LA0AvfZkrc0w==, tableContent=null), ArticleFig(id=1266686996316574469, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.10, caption=
Crack opening wideth and opening speed of freeze-thaw specimens, figureFileSmall=o7GS3C4SA3bTBJIqj3+3uw==, figureFileBig=3dkOK9uY8bY131LdeZ3Vsw==, tableContent=null), ArticleFig(id=1266686996383683334, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图10, caption=
冻融试件裂纹张开宽度及张开速度, figureFileSmall=o7GS3C4SA3bTBJIqj3+3uw==, figureFileBig=3dkOK9uY8bY131LdeZ3Vsw==, tableContent=null), ArticleFig(id=1266686996467569415, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.11, caption=
The schematic diagram of the calculation method of the FPZ length, figureFileSmall=zmmjuhUkoM71dPb0wdSQCw==, figureFileBig=0iEwFJbMtHRYnzQOMViThw==, tableContent=null), ArticleFig(id=1266686996543066888, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图11, caption=
FPZ长度的计算方法示意, figureFileSmall=zmmjuhUkoM71dPb0wdSQCw==, figureFileBig=0iEwFJbMtHRYnzQOMViThw==, tableContent=null), ArticleFig(id=1266686996618564361, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.12, caption=
The development pattern of FPZ within 25 ms before the peak load, figureFileSmall=yGWLM9ce/VPfcYBSoynk8A==, figureFileBig=ylPHxyezvb6hBxHcf7/X3Q==, tableContent=null), ArticleFig(id=1266686996681478922, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图12, caption=
峰值荷载前25 ms内的FPZ发育规律, figureFileSmall=yGWLM9ce/VPfcYBSoynk8A==, figureFileBig=ylPHxyezvb6hBxHcf7/X3Q==, tableContent=null), ArticleFig(id=1266686996756976395, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.13, caption=
The maximum value of FPZ under different freeze-thaw cycles, figureFileSmall=uQ+N8wOAtvURS87jnuAfBA==, figureFileBig=WNoWM//C+0Aajp8tOdOWLA==, tableContent=null), ArticleFig(id=1266686996824085260, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图13, caption=
不同冻融循环下的FPZ最大值, figureFileSmall=uQ+N8wOAtvURS87jnuAfBA==, figureFileBig=WNoWM//C+0Aajp8tOdOWLA==, tableContent=null), ArticleFig(id=1266686996891194125, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Fig.14, caption=
Comparison of FPZ maximums under different freeze-thaw cycles, figureFileSmall=0VBW5QNHdWCBKjhn5gf9zg==, figureFileBig=fpTCnp+V1+tlhLULtWl7mQ==, tableContent=null), ArticleFig(id=1266686996966691598, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=图14, caption=
不同冻融循环下FPZ最大值的比较, figureFileSmall=0VBW5QNHdWCBKjhn5gf9zg==, figureFileBig=fpTCnp+V1+tlhLULtWl7mQ==, tableContent=null), ArticleFig(id=1266686997037994767, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Table 1, caption=
Initial physical and mechanical parameters of blue sandstone
, figureFileSmall=null, figureFileBig=null, tableContent=
| 纵波波速/(m·s−1) | 干密度/(g·cm−3) | 饱和密度/(g·cm−3) | 饱和含水率/% | 含水饱和度系数 | 峰值应力/MPa |
| 3 138.08 | 2.26 | 2.33 | 3.76 | 0.86 | 77.03 |
), ArticleFig(id=1266686997096715024, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=表1, caption=
青砂岩的初始物理力学参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 纵波波速/(m·s−1) | 干密度/(g·cm−3) | 饱和密度/(g·cm−3) | 饱和含水率/% | 含水饱和度系数 | 峰值应力/MPa |
| 3 138.08 | 2.26 | 2.33 | 3.76 | 0.86 | 77.03 |
), ArticleFig(id=1266686997159629585, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Table 2, caption=
Statistics of fracture toughness and tensile strength
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试样编号 | KId /(MPa·m1/2) | σd/MPa |
| 0-d1-1 | 1.283 | 0.719 5 |
| 0-d1-2 | 1.188 | 0.666 3 |
| 均值 | 1.236 | 0.692 9 |
| 0-d2-1 | 1.029 | 0.576 9 |
| 0-d2-2 | 1.017 | 0.569 9 |
| 均值 | 1.023 | 0.573 4 |
| 0-d3-1 | 0.733 | 0.410 3 |
| 0-d3-2 | 0.655 | 0.366 6 |
| 均值 | 0.694 | 0.388 5 |
| 0-d4-1 | 0.584 | 0.327 2 |
| 0-d4-2 | 0.480 | 0.269 1 |
| 均值 | 0.532 | 0.298 2 |
), ArticleFig(id=1266686997226738450, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=表2, caption=
断裂韧度与抗拉强度统计结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试样编号 | KId /(MPa·m1/2) | σd/MPa |
| 0-d1-1 | 1.283 | 0.719 5 |
| 0-d1-2 | 1.188 | 0.666 3 |
| 均值 | 1.236 | 0.692 9 |
| 0-d2-1 | 1.029 | 0.576 9 |
| 0-d2-2 | 1.017 | 0.569 9 |
| 均值 | 1.023 | 0.573 4 |
| 0-d3-1 | 0.733 | 0.410 3 |
| 0-d3-2 | 0.655 | 0.366 6 |
| 均值 | 0.694 | 0.388 5 |
| 0-d4-1 | 0.584 | 0.327 2 |
| 0-d4-2 | 0.480 | 0.269 1 |
| 均值 | 0.532 | 0.298 2 |
), ArticleFig(id=1266686997293847315, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=EN, label=Table 3, caption=
FPZ theoretical and experimental values comparison
, figureFileSmall=null, figureFileBig=null, tableContent=
| 冻融循环次数 | 理论值/ mm | 试验值/ mm | 误差/ % |
| 20 | 3.769 7 | 3.9 | 3.46 |
| 40 | 2.870 6 | 3.1 | 7.99 |
| 60 | 1.869 4 | 2.0 | 6.99 |
| 80 | 1.319 2 | 1.4 | 6.12 |
), ArticleFig(id=1266686997394510612, tenantId=1146029695717560320, journalId=1266358798366031926, articleId=1266686981347103345, language=CN, label=表3, caption=
FPZ理论值与试验值比较
, figureFileSmall=null, figureFileBig=null, tableContent=
| 冻融循环次数 | 理论值/ mm | 试验值/ mm | 误差/ % |
| 20 | 3.769 7 | 3.9 | 3.46 |
| 40 | 2.870 6 | 3.1 | 7.99 |
| 60 | 1.869 4 | 2.0 | 6.99 |
| 80 | 1.319 2 | 1.4 | 6.12 |
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